"The hacker group LulzSec on Thursday posted information it took from Sony Entertainment and Sony BMG on its site, called the LulzBoat. The information includes about a million usernames and passwords of customers in the U.S., Netherlands and Belgium and is available for download and posted on the group's site. A release posted on LulzSec's page said the group has more, but can't copy all of the information it stole. The group also said none of the information it took from Sony was encrypted."

When Sony gets hacked too much, what will happen ?
A/They will do nothing/try to challenge the hacker community, and will die tragically
B/They will realize that they have good engineers&designers (yes, they totally do) but poor management, and will invest in competent managers
C/It will create a black hole and the world will end
D/Obi-Wan Kenobi

E/The most probable one: they will lobby the government for more rights for themselves, using these hacks and the need to "be able to track down the hackers and pirates" so they don't need court orders to request ISPs for customer information etc. And the government actually goes through and gives them that./

That amounts to A : they can't stop people from hacking them, no matter how much lobbying they do and how much legal protection they get, be it only because any sane hacker doing this kind of things use the compromised computers of innocent people and leave no track of their identity.

Don't kid yourself. There's no such thing as completely covering your tracks with something like this. The second the government starts throwing words like cyberterrorism around, all sorts of normally frowned upon avenues of investigation open up.